unattended-upgrade removes bridge-utils

gistfile1.txt

2018-12-19 02:26:00,476 INFO Checking if system is running on battery is skipped. Please install powermgmt-base package to check power status and skip installing updates when the system is running on battery.
2018-12-19 02:26:00,509 INFO Initial blacklist : (lib)?xen(store)?
2018-12-19 02:26:00,513 INFO Initial whitelist: 
2018-12-19 02:26:00,514 INFO Starting unattended upgrades script
2018-12-19 02:26:00,515 INFO Allowed origins are: origin=Debian,codename=buster,label=Debian, origin=Debian,codename=buster,label=Debian-Security
2018-12-19 06:45:46,556 INFO Checking if system is running on battery is skipped. Please install powermgmt-base package to check power status and skip installing updates when the system is running on battery.
2018-12-19 06:45:46,587 INFO Initial blacklist : (lib)?xen(store)?
2018-12-19 06:45:46,591 INFO Initial whitelist: 
2018-12-19 06:45:46,593 INFO Starting unattended upgrades script
2018-12-19 06:45:46,594 INFO Allowed origins are: origin=Debian,codename=buster,label=Debian, origin=Debian,codename=buster,label=Debian-Security
2018-12-19 06:46:45,269 INFO Packages that will be upgraded: borgbackup debhelper ldnsutils libboost-iostreams1.62.0 libboost-random1.62.0 libboost-system1.62.0 libboost-thread1.62.0 libcacard0 libcap-ng0 libedit2 libldns2 libnss3 libopencv-core3.2 libopencv-imgproc3.2 libpixman-1-0 libpython3-dev libpython3-stdlib lr
2018-12-19 06:46:45,271 INFO Writing dpkg log to /var/log/unattended-upgrades/unattended-upgrades-dpkg.log
2018-12-19 06:49:26,014 INFO All upgrades installed
2018-12-19 06:50:11,538 WARNING Keeping auto-removable libboost-random1.67.0 package(s) because it would also remove the following packages which should be kept in this step: librados2 librbd1
2018-12-19 06:50:20,622 WARNING Keeping auto-removable libibverbs1 package(s) because it would also remove the following packages which should be kept in this step: librados2 librbd1
2018-12-19 06:50:23,004 WARNING Keeping auto-removable libboost-regex1.67.0 package(s) because it would also remove the following packages which should be kept in this step: librados2 librbd1
2018-12-19 06:50:25,378 WARNING Keeping auto-removable libboost-atomic1.67.0 package(s) because it would also remove the following packages which should be kept in this step: librados2 librbd1
2018-12-19 06:50:34,704 WARNING Keeping auto-removable libboost-thread1.67.0 package(s) because it would also remove the following packages which should be kept in this step: librados2 librbd1
2018-12-19 06:50:37,046 WARNING Keeping auto-removable libboost-iostreams1.67.0 package(s) because it would also remove the following packages which should be kept in this step: librados2 librbd1
2018-12-19 06:50:38,221 INFO Packages that were successfully auto-removed: bridge-utils ibverbs-providers libpython3.6 libpython3.6-dev libpython3.6-minimal libpython3.6-stdlib python3.6 python3.6-dev python3.6-minimal
2018-12-19 06:50:38,223 INFO Packages that are kept back: libboost-atomic1.67.0 libboost-iostreams1.67.0 libboost-random1.67.0 libboost-regex1.67.0 libboost-thread1.67.0 libibverbs1